New version of Uno R3 - with A6 and A7 analog pins..
Uno R3 CH340G/ATmega328 - compatible with Arduino Uno R3 board. Built on the Atmel ATmega328 microcontroller and USB-UART interface chip CH340G.
Board for functionality similar to the Arduino Uno (ATmega 28). It is a budget, but the same stable, and uses the original chips Atmel ATmega328 (16 MHz).
The board used the chip CH340G as converter UART-USB. Chip CH340G - is a budget solution. When you work in the frequency 12Mhz, giving a stable result of data exchange (need install drivers to computer).